Integrative rotation buckle design,Pressure rotation button, Automatic water release,Stronger airtight effect ... YI Multi-functional teapotCapacity:750mlBody Materials: borosilicate glass, with a 3.3 expansion coefficient.The products can ... are fine,non-absorbent and products are crystal clear,elegant,and practical.3).Superior acid,a;kali ... product quality inspection standards. Glass teapot with button